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Layer: All Dive Sites (0)

Name: All Dive Sites

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Description: The quality of the habitat information derived from remotely sensed data is determined by the quantitative process of accuracy assessment and ground validation. The purpose of accuracy assessment is to identify and quantify errors in the maps by comparing the attributes of the map versus reference data at various sites. Selected sites were visited in the field for typological validation.

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Layer: Accuracy Assessment Sites (1)

Name: Accuracy Assessment Sites

Display Field: Site_ID

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Description: The purpose of this survey data was to collect information on current habitat conditions at random locations throughout the mapping area. Locations were determined by an iterative, GIS-based, stratified random sampling technique to ensure that all bottom classifications would be assessed. This information was used to evaluate the thematic accuracy of the St. John benthic habitat map.

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Layer: Ground Validation Sites (2)

Name: Ground Validation Sites

Display Field: Site_ID

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Description: The purpose of this survey data was to investigate areas of imagery where uncertainties existed on the photo interpreter's behalf during the decision making process of benthic habitat classification in St. John. This information was incorporated into a fine-scale assessment of the status, abundance, and distribution of marine habitats of St. John.

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Layer: ROV Transects (3)

Name: ROV Transects

Display Field: Name

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Description: The trackline of the Remotely Operated Vehicle (ROV) used to capture underwater video

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Layer: Virgin Islands Coral Reef National Monument (4)

Name: Virgin Islands Coral Reef National Monument

Display Field: NAME

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The protected area boundary

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Layer: Virgin Islands National Park (5)

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Display Field: NAME

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Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Layer: Study Area (Shallow) (6)

Name: Study Area (Shallow)

Display Field: OBJECTID

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Description: The study area of the project is the shallow water (<30 meter) region south of St. John, USVI

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Layer: Habitat Boundary (Shallow) (7)

Name: Habitat Boundary (Shallow)

Display Field: M_STRUCT

Type: Feature Layer

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Description: These are the boundaries for all polygons in the classification scheme, broken out by the Biological Cover, Live Coral Cover, Structure, and Zone fields.

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Layer: Biological Cover (Shallow) (8)

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Description: Eighteen distinct and non-overlapping biological cover classes were identified that could be mapped through visual interpretation of remotely sensed imagery. Cover classes refer only to the dominant biological component colonizing the surface of the feature and do not address location (e.g., on the shelf or in the lagoon) or structure type. Habitats or features that cover areas smaller than the MMU were not considered. The cover types are defined in a collapsible hierarchy ranging from eight major classes (Algae, Seagrass, Live Coral, Mangrove, Coralline Algae, No Cover, Unclassified and Unknown), combined with a modifier describing the distribution of the dominant cover type throughout the polygon (10%<50%, 50%-<90%, and 90%-100%).

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Layer: Study Area (Moderate) (12)

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Description: The study area of the project is the moderate depth waters off the south coast of St. John, USVI

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Layer: Habitat Boundary (Moderate) (13)

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Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Description: Five distinct and non-overlapping biological cover classes were mapped using a combination of semi-automated classification and visual interpretation of acoustic imagery. Cover classes refer to the dominant biological component colonizing the surface of the habitat feature, and does not address its location (e.g., on the Bank/Shelf). Habitats features that covered areas smaller than the MMU (1,000 m2) were not mapped independently. Biological cover types were grouped into five major classes (i.e., Algae, Seagrass, Live Coral, No Cover and Unknown), and were combined with a modifier describing the density and distribution of the dominant cover type within the habitat feature (i.e., 10%-<50%, 50%-<90%, and 90%-100%).

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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Description: Four distinct and non-overlapping percent live coral classes were mapped using a combination of semi-automated classification and visual interpretation of acoustic imagery. This attribute is an additional biological cover modifier used to denote information about the percent cover of live coral (both scleractinian and octocorals), when it was not the dominant cover type. In order to provide resource managers with additional information about corals, four range classes were used (0% - <10%, 10% - <50%, 50% - <90%, and 90% - 100%).

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

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YMin: 2064862.8993000016
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Spatial Reference: 102100  (3857)



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Supports Sql Expression: true
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Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false


HasZ: false

HasM: false

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Fields:
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• Area ( type: esriFieldTypeInteger, alias: Area )
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• M_STRUCT ( type: esriFieldTypeString, alias: Major Structure, length: 50 )
• D_STRUCT ( type: esriFieldTypeString, alias: Detailed Structure, length: 50 )
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Layer: Structure (Moderate) (16)

Name: Structure (Moderate)

Display Field: D_STRUCT

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Thirteen distinct and non-overlapping geomorphological structure types were mapped using a combination of semi-automated classification and visual interpretation of acoustic imagery. Geomorphological structure refers to a habitat feature’s dominate physical composition and does not address its location (e.g., on the Bank/Shelf). The structure types are defined in a collapsible hierarchy ranging from three major classes (Coral Reef and Hardbottom, Unconsolidated Sediment, and Unknown), to ten detailed classes (Individual Patch Reef, Aggregated Patch Reefs, Aggregate Reef, Pavement, Pavement with Sand Channels, Rhodoliths, Rhodoliths with Scattered Coral and Rock, Sand, Sand with Scattered Coral and Rock and Unknown). Habitat features with areas smaller than the map’s minimum mapping unit or MMU (1,000 m2) were not considered. For example, sand halos surrounding individual patch reefs were often too small to be mapped independently.

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

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Max Scale: 0

Supports Advanced Queries: true

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Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:
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YMin: 2064862.8993000016
XMax: -7197794.3103
YMax: 2074153.564199999
Spatial Reference: 102100  (3857)



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HasZ: false

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Layer: Zone (Moderate) (17)

Name: Zone (Moderate)

Display Field: ZONE

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: One geographic zone (i.e., Bank/Shelf) was identified in the moderate-depth area, corresponding to typical insular shelf and coral reef geomorphology.Zone only refers to the location of a benthic habitat feature and does not address the habitat feature’s substrate or biological cover types. For example, the Bank/Shelf zone may include patch reefs and pavement; however, these are considered structural elements that may or may not occur within the Bank/Shelf zone and therefore, are not used to define it.

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:
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YMin: 2064862.8993000016
XMax: -7197794.3103
YMax: 2074153.564199999
Spatial Reference: 102100  (3857)



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Field 2: N/A
Field 3: N/A
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  Label: Bank/Shelf
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Layer: Bathymetry (18)

Name: Bathymetry

Display Field:

Type: Raster Layer

Geometry Type: null

Description: This image represents a 2x2 meter resolution bathymetry surface of the moderate-depth portion of the NPS's Virgin Islands Coral Reef National Monument, south of St. John, US Virgin Islands. The depth values contained in this surface are in meters.

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

Default Visibility: false

MaxRecordCount: 0

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Spatial Reference: 102100  (3857)



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Type ID Field: null

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Layer: Slope (19)

Name: Slope

Display Field:

Type: Raster Layer

Geometry Type: null

Description:

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

Default Visibility: false

MaxRecordCount: 0

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: false

Supports Statistics: false

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Use Standardized Queries: true

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YMin: 2056056.9601334324
XMax: -7197047.742139555
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Spatial Reference: 102100  (3857)



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Layer: Hillshade (20)

Name: Hillshade

Display Field: Value

Type: Raster Layer

Geometry Type: null

Description: Hillshade was calculated from the bathymetry surface for each raster cell using ArcGIS's Spatial Analyst 'Hillshade' Tool.

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

Default Visibility: false

MaxRecordCount: 0

Supported Query Formats: JSON, geoJSON, PBF

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Supports Datum Transformation: true

Extent:
XMin: -7213033.256002589
YMin: 2064860.7653617274
XMax: -7197757.256002589
YMax: 2074234.7653617274
Spatial Reference: 102100  (3857)



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Layer: Backscatter (21)

Name: Backscatter

Display Field: Value

Type: Raster Layer

Geometry Type: null

Description: This image represents a 2x2 meter resolution backscatter mosaic of the moderate-depth portion of the NPS's Virgin Islands Coral Reef National Monument, south of St. John, US Virgin Islands. The backscatter values are in relative 8-bit (0 – 255) values, since neither intensity surface was calibrated. Soft bottom and rhodolith habitat types were delineated and classified from this backscatter image.

Copyright Text: NOAA/NOS/NCCOS/MSE/Biogeography Branch

Default Visibility: false

MaxRecordCount: 0

Supported Query Formats: JSON, geoJSON, PBF

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Spatial Reference: 102100  (3857)



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